<template>
  <div class="list" ref="wrapper">
    <div>
      <!-- 当前城市 -->
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{ city }}</div>
          </div>
        </div>
      </div>
      <!-- 热门城市 -->
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper" v-for="item in hotCities" :key="item.id" @click="handleClickCity(item.name)">
            <div class="button">{{ item.name }}</div>
          </div>
        </div>
      </div>
      <!-- 城市 -->
      <div class="area" v-for="(item, key) of cities" :key="key" :ref="key">
        <div class="title border-topbottom">{{ key }}</div>
        <div class="item-list">
          <div class="item border-bottom" v-for="innerItem in item" :key="innerItem.id" @click="handleClickCity(innerItem.name)">{{ innerItem.name }}</div>
        </div>
      </div>
    </div>
  </div>
</template>
<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'CityList',
  data() {
    return {}
  },
  props: {
    cities: Object,
    hotCities: Array,
    letter: String
  },
  computed: {
    ...mapState(['city'])
  },
  methods: {
    ...mapMutations(['changeCity']),
    handleClickCity(city) {
      this.changeCity(city)
      this.$router.push('/')
    }
  },
  mounted() {
    this.$nextTick(_ => {
      this.scroll = new Bscroll(this.$refs.wrapper, { click: true })
    })
  },
  watch: {
    letter() {
      const element = this.$refs[this.letter][0]
      this.scroll.scrollToElement(element)
    }
  }
}
</script>
<style lang="less" scoped>
@import '~styles/varibles.less';
.border-topbottom {
  &::before {
    border-color: #ccc;
  }
  &::after {
    border-color: #ccc;
  }
}
.border-bottom {
  &::before {
    border-color: #ccc;
  }
  &::after {
    border-color: #ccc;
  }
}
.list {
  overflow: hidden;
  position: absolute;
  top: 1.58rem;
  left: 0;
  right: 0;
  bottom: 0;
  .title {
    line-height: 0.54rem;
    background: #eee;
    padding-left: 0.2rem;
    color: #666;
    font-size: 0.26rem;
  }
  .button-list {
    overflow: hidden;
    padding: 0.1rem 0.6rem 0.1rem 0.1rem;
    .button-wrapper {
      float: left;
      width: 33.33%;
      .button {
        margin: 0.1rem;
        padding: 0.1rem 0;
        text-align: center;
        border: 0.02rem solid #ccc;
        border-radius: 0.06rem;
      }
    }
  }
  .item-list {
    .item {
      line-height: 0.76rem;
      padding-left: 0.2rem;
    }
  }
}
</style>
